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 Implements sending messages. Can be used for implementing both sending Command-messages and Document Messages.
 <ul>
 	<li>
		<a href="http://www.eaipatterns.com/CommandMessage.html" target="_top">Command message web site</a>
	</li>
	<li>
		<a href="http://www.eaipatterns.com/DocumentMessage.html" target="_top">Document message web site</a>
	</li>
</ul>
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